$1.$ What are the key commonalities of Amazon's successful strategic moves $($Marketplace$,$ Prime, AWS, Kindle?$)$

$2.$ What are the key commonalities of Amazon's failed strategic moves $($Auctions$,$ A$9$ Search Engine, Endless.com, Fire Phone$)?$

$3.$ What divides successful strategic moves from failures?

$4.$ Why do investors trade Amazon's present for the future? What should be Amazon's strategic focus for future growth?